August j



(No Model.) 9 A. J. OEHRING.-

ELECTRIC PUSH BUTTON.

No. 539,079. Patented May 14, 1895.

NIL

iii!" WITNESSES INVENTEIR B11 rain Riggs,

NIT D STATES --ATENT Fries.

AUGUST J. OEHRING, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE WESTERN ELECTRIC COMPANY, OF SAME PLACE.

ELECTRIC PUSH-BUTTON- SPECIFICATION forming part of Letters Patent No. 539,079, dated May 14, 1 895.

Application filed November 2, 1893. Serial No. 489,843. (No model.)

To aZZ whom it may concern:

Be it known that LAUGUST J. OEHRING, a citizen of the United States, residing at Ohicago, in the county of Cook and State of Illi- 5 nois, have invented a certain new and useful Improvement in ElectricPush-Buttons, (Case sists in certain novel details of construction as hereinafter described.

My invention is illustrated in the accompa nying drawings and will be described with reference thereto.

Figure 1 of the drawings is a perspective view of the front of my improved push-button. Fig. 2 is aview of the base-plate. Fig. 3 is a plan of the push-button with the cover 2 5 removed, showing the parts in position. Fig.

4 is a central sectional view. Fig. 5 is a perspective view of the plate or piece of insulating material which, mounted within the pushbutton, serves as an insulating-support for the electrical switch parts of the push-button. Fig. 6 is a perspective view of the contactspring and the screw for retaining it in place. Fig. 7 is a similar view of the switch-spring.

The switch parts of the push button are 5 mounted upon a circular base plate a which is provided with a cup-shaped cover I) which is screwed upon a threaded annular projection upon the base plate in the usual manner. The base a is open in its central portion and is provided with six inwardly projecting lugs d and e. The lugs dare perforated to receive screws for fastening the push button in place. The lugs e are provided with upwardly projecting studs or pins 6' cast inte- 4 gral with them. A plate f of some insulating material, as hard rubber or vulcanized fiber, is punched of a form shown in Fig. 5. The recesses in the sides of the plate are made of such depth and length that the plate may 50 enter between the pins 0 and may fitso closely as to be prevented from lateral and longitudinal movement. The plate f is'provided with perforations g h i k Zmwhich may be punched in it in the same operation in which the plate is punched. When the plate fis placed in 5 position between the pins 6' in the base plate, these pins are bent over upon the plate, thus securely holding the latter in position. It will be understood that the base a should be cast of some soft and yielding metal, as brass, to permit such bending of the pins. A curved switch lever n, punched from resilient metal,

is then placed upon the plate f, the downwardly projecting tip n/ of thespring being inserted through the hole m in plate f. The link-shaped punching 0 is then placed under the plate, the opening 0' receiving the projection it, which latter is bent over upon t 6 link, thus uniting the two parts and securing them to the plate f. A screw p is then passed through the opening in spring 12. and through the hole Zin platefand screwed into the opening 0 in link o'which is threaded for the purpose, a washer being placed under the head of the screw in the ordinary manner for the purpose of binding the circuit wire. By this means the switch spring% is securely fixed to the plate and any displacement of it is prevented. The curved extremity of the punching q is then inserted through the opening h l in the plate, its extremity q being arranged immediately beneath the extremity of the spring n in the center'ot' the push button, and the screw 1" with a washer under it is screwed down into the punching g which is threaded to receive it. The screw rforms the binding screw of the switch contact q. The openings 9 and h in platefpermit the circuit wires to be passed through the plate and secured in place.

Having thus described my invention, I claim as new and desire to secure by Letters *Patent 10 tending through the switch spring and screwing into the link, whereby the spring is se- 1 curely heldin placeupon theplate, anda contact adapted to be engaged by said switch spring 71, substantially as described.

In witness whereof I hereunto subscribe my 15 name this 13tl1 day of October, A. D. 1893. AUGUST J. OEHRING. Witnesses:

DUNCAN E. WILLETT, LUOILE RUSSELL. 

